Single ion solid-state composite electrolytes with high electrochemical stability based on a poly(perfluoroalkylsulfonyl)-imide ionene polymer

Shi, Qianru; Xue, Lixin; Qin, Dejun; Du, Bing; Wang, Jian; Chen, Liquan

doi:10.1039/c4ta02810d

Cited by 54 publications

(43 citation statements)

References 42 publications

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“…t Li + of PEO‐LiPFSDI‐20 complex is 0.89 (Supporting Information, Figure S4). It is much higher than PEO‐LiTFSI‐20 reported in the literature ( t Li + =0.29), and very similar to the analogous PEO‐LiPFSI‐20 complex described previously ( t Li + =0.908) . The fact that the Li‐ion transference number is close to unity demonstrates that PEO‐LiPFSDI‐20 performs a single Li‐ion conductor feature.…”

Section: Resultssupporting

confidence: 80%

“…In contrast, there are no clear peaks in curves of Li/PEO‐LiPFSDI‐20/stainless‐steel and Li/PEO‐LiPFSI‐20/stainless‐steel cells after 5 V. The anions of the cells are anchored to the polymer backbone, leading to slow migrate rate in the electrolyte medium. Importantly, Li/PEO‐LiPFSDI‐20/stainless‐steel cell is stable up to 6 V versus Li + /Li, which is higher than the 5.5 V for Li/PEO‐LiPFSI‐20 stainless‐steel cell . The high oxidation potential of imide salts with conjugated polydianion was also reflected in the study of a tri‐imide sodium salt by Nie .…”

Section: Resultsmentioning

confidence: 89%

“…The materials exhibit high performance in terms of ionic conductivity (1.3×10 −5 S cm −1 at 60 °C) and Li + transport number (0.85) for LIBs. Recently, our group developed a non‐aromatic main‐chain type lithium poly(perfluoroalkylsulfonyl)imide ionomer (LiPFSI, Figure f) containing a flexible and stable perfluoroether connector,−CF 2 −CF 2 −O−CF 2 −CF 2 − . The perfluoroalkylsulfonimide backbone can give the polymer relatively high concentration of cations and stable electrochemical property.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we synthesized a new type of SLICP with conjugated sulfonyl‐imide group (that is, −SO 2 −N (−) −SO 2 −N (−) −SO 2 −), namely lithiated poly(perfluoroalkylsulfonyl)di‐imide (LiPFSDI, Figure g). Incorporating neighboring sulfonyl‐imides should facilitate the electron delocalization and increase the concentration of cation compared to the normal analogous mono‐imide based SLICPs . This new sulfonimide structure will lead to increased ionic conductivity in PEO−LiPFSDI composite electrolytes, and is expected to exhibit improved electrochemical properties as well as high cycling performance in battery applications.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis and Application of a Conjugated Polydianion‐Based Single‐Ion Conducting Polymer for High‐Performance Solid Lithium‐Ion Batteries

Zeng

Lü

et al. 2019

ChemElectroChem

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Fluorosulfonimide lithium salts have been widely used as conductors in solid polymer electrolytes for solid Li‐ion batteries (LIBs). However, low conductivity and poor compatibility with the polymer host (usually polyethylene oxide, PEO) remain challenges in the design of these salts. In this paper, we synthesized a highly Li+‐conductive salt containing the poly(perfluoroalkylsulfonyl)diimide (PFSDI−) dianion for the first time. LiPFSDI represents the first example of a single Li‐ion‐conducting polymer (SLICP) with a conjugated sulfonimide moiety (−SO2−N(−)−SO2−N(−)−SO2−). The PEO−LiPFSDI blend electrolyte exhibits significant enhancements in ionic conductivity (2.24×10−4 S cm−1 at 80 °C)and electrochemical stability (up to 6 V vs. Li+/Li). A prototype LiFePO4/Li battery with the PEO−LiPFSDI composite electrolyte shows excellent cycling performance with a high reversible capacity of 148 mAh g−1 at a rate of 0.1 C and 135 mAh g−1 at 0.2 C (70 °C), and maintains 100 stable cycles for over 1500 hours.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and Application of a Conjugated Polydianion‐Based Single‐Ion Conducting Polymer for High‐Performance Solid Lithium‐Ion Batteries

Zeng

Lü

et al. 2019

ChemElectroChem

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show abstract

“…Another example by Hallac et al shows a single fluorinated lithium sulfonimide attached to poly(ethylene glycol) ( 148 , Scheme ) . Watanabe and co‐workers developed polyanion LiPPI (Scheme ), which they alloyed with polyethers, and a similar polyanion, LiPFSI (Scheme ), was synthesized as a blend with polyvinylidene fluoride and poly(ethylene glycol) . All mentioned polymers were examined for their electrochemical properties.…”

Section: Applications Of Cf2cf2‐containing Compoundsmentioning

confidence: 99%

Advances in the Synthesis and Application of Tetrafluoroethylene‐ and 1,1,2,2‐Tetrafluoroethyl‐Containing Compounds

et al. 2018

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In this review, we provide a comprehensive and critical perspective on the synthesis and application of 1,1,2,2‐tetrafluoroethyl‐ and tetrafluoroethylene‐containing compounds. These structures have been the focus of increasing attention as witnessed by a spectrum of new synthetic approaches, which have recently appeared in the literature. Likewise, applications of molecules containing the CF2CF2 fragment as pharmaceuticals, agrochemicals, pesticides, and advanced materials are described. It is expected that the number of successful applications of these compounds will increase in the future as a result of availability of the synthetic methods outlined here.

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Accelerated Selective Li+ Transports Assisted by Microcrack‐Free Anionic Network Polymer Membranes for Long Cyclable Lithium Metal Batteries

Gao,

Zhou,

Chen

et al. 2024

Advanced Science

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Rechargeable Li metal batteries have the potential to meet the demands of high‐energy density batteries for electric vehicles and grid‐energy storage system applications. Achieving this goal, however, requires resolving not only safety concerns and a shortened battery cycle life arising from a combination of undesirable lithium dendrite and solid‐electrolyte interphase formations. Here, a series of microcrack‐free anionic network polymer membranes formed by a facile one‐step click reaction are reported, displaying a high cation conductivity of 3.1 × 10−5 S cm−1 at high temperature, a wide electrochemical stability window up to 5 V, a remarkable resistance to dendrite growth, and outstanding non‐flammability. These enhanced properties are attributed to the presence of tethered borate anions in microcrack‐free membranes, which benefits the acceleration of selective Li+ cations transport as well as suppression of dendrite growth. Ultimately, the microcrack‐free anionic network polymer membranes render Li metal batteries a safe and long‐cyclable energy storage device at high temperatures with a capacity retention of 92.7% and an average coulombic efficiency of 99.867% at 450 cycles.

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Single ion solid-state composite electrolytes with high electrochemical stability based on a poly(perfluoroalkylsulfonyl)-imide ionene polymer

Cited by 54 publications

References 42 publications

Synthesis and Application of a Conjugated Polydianion‐Based Single‐Ion Conducting Polymer for High‐Performance Solid Lithium‐Ion Batteries

Synthesis and Application of a Conjugated Polydianion‐Based Single‐Ion Conducting Polymer for High‐Performance Solid Lithium‐Ion Batteries

Advances in the Synthesis and Application of Tetrafluoroethylene‐ and 1,1,2,2‐Tetrafluoroethyl‐Containing Compounds

Accelerated Selective Li+ Transports Assisted by Microcrack‐Free Anionic Network Polymer Membranes for Long Cyclable Lithium Metal Batteries

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